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Inventory - Schedule of Components of Inventory (Details) - USD ($) $ in Thousands | Sep. 30, 2019 | Sep. 30, 2018
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Inventory Disclosure [Abstract] |  |
Purchased parts and raw materials | $ 15,192 | $ 15,907
Work-in-process | 4,215 | 4,159
Finished goods | 3,183 | 3,072
Inventory, gross | 22,590 | 23,138
Excess and obsolete reserves | (5,058) | (5,303)
Inventory | $ 17,532 | $ 17,835

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